Machine for finishing cotter-pins



2 Sheets-S,heet 1.

(No Model.)

J. ADT.

MACHINE FOR FINISHING GOTTER PINS.

atented Nov. 29, 1887.

IIIIIH III N. PETERS, Phollrumographun washin lm DIQ (No Model.)

ADT. MACHINE FOR FINISHING GOTTER PINS. No. 374,136. Patented Nov. 29, 1887.

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UNITED STATES PATENT Creme...

JOHNADT, OF NEW HAVEN, CONNECTICUT.

MACHINE FOR FlNiSHlNG COTTER-PINS.

SPECIFICATION forming part of Letters Patent No. 374,136, dated November 29, 1887.

Application filed August 29,1857. Serial No. 948,105. (No model.)

To all whom it may concern:

Be it known that I, JOHN ADT, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new Improve ment in Machines for the Manufacture of Cotter-Pins; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, 1n-

Figure 1, a side view of the machine with a portion of the mandrel carrying the cutter for shaping the conical ends of the point; Fig. 2, a top view of the same, the said mandrel omitted; Fig. 3, a portion of the disk,showing the blade and mill, all enlarged for convenience of illustration; Fig. 4,ahorizontal section through the mill, the disk, and adjacent parts at the mill; Fig. 5, radial sections through a portion of the disk and blade at the point where the pin comes first in contact with the blade; Fig. 6, a like section showing the position of the pin after it has passed onto the blade; Fig. 7, the finished pin; Fig. 8, a modification in the disk.

This invention relates to an improvement in machines for finishing the point ends of cotter-pins, and particularly to that class which are made from half-round wire, the two legs of the pin brought together, flat faces toward each other. It is necessary that these pins have their tip ends beveled upon the inside, so as to form a V-space between the two legs when the legs are forced close together-as when inserted into the hole prepared for the pin-and so that such recess may afford a convenient means for the introduction of an instrument to bend the legs of the pin to prevent its escape. It is also necessary that the pins shall have the tip ends of the legs reduced upon their outer surface into a conical shape.

The object of my invention is to finish the tip ends of the pins so that uniformity of shape shall be produced.

In carrying out my invention I arrange a revolving disk, A, upon a shaft, B, supported in suitable bearings, C, and so that rotation imparted to the shaft by belt or otherwise will cause the disk A to revolve with it. The

thickness of the disk corresponds substantially to the width of the head end of the cotter-pins which the machine is adapted to operate upon. In the said disk a series of radial slots, at, are formed, the depth of the slots being somewhat less than the extreme length of the cotter-pins, so that the pins may project beyond the periphery of the disk, as seen in Fig. 3, b representing the pin. The slotsin the disk, however, may be made of maximum depth for the length of pins and the inner ends of the slots filled to form stops, so that the heads of the pins will come to a uniform position in the respective slots, as indicated in Fig. 3. The disk A revolves between two stationary cheeks, D D, one at each side, as seen in Fig. 2, and so that the operator may introduce the bent blanks successively into the slots, the blanks so introduced being carried forward between the cheeks D D, the disk revolving in the direction indicated by the arrow in Fig. l.

E is a revolving mill arranged upon an arbor, F, and caused to revolve rapidly by the application of power thereto through a pulley, G, or otherwise, and in the usual manner for driving such mills. The mill at its outer edge is of inverted-V shape, as seen in Fig. 4, the

shape of the edge corresponding to the recess which it is desired to make at the tip between the two legs of the pin.

It is necessary that the legs of the pin shall be presented to the mill alike upon the respective sides. To accomplish this object a pair of jaws, H H, are arranged upon the cheeks D, as seen in Figs. 1 and 5. These cheeks stand a distance back from the mill, and the width between them corresponds to the width of the pin closed, as seen in Fig. 5. Naturally the legs stand a little open, but as they are carried around by the disk A and come to thejaws H H the twolegs are pressed substantially close together and so as to bring the two legs into a central position.

At a point immediately succeeding the jaws H aseparating-blade, I, is arranged stationary, its edge toward the disk sharp or knife shape, as seen in Fig. 5, the edge being in the central plane of the pin as it passes between the jaws HH, and so that as the pins advance through the jaws the end of the pin comes upon the blade, and so that the blade will positively enter between the two legs. The blade continues downward between the mill E and the periphery of the carrying-disk A, and so that as the pin first comes upon the blade I one leg will surely pass each side the blade, as seen in Figs. 3 and 6, and, continuing, will be carried to the mill, one of the legs each side the blade, as seen in Figs. 3 and 4.

At the point where the mill operates upon the legs a second pair of stationary jaws, J J, are arranged, as seen in Fig. 4, against which the outer surface of the two legs bears, as it is divided by the blade I. These jaws support the legs against the action of the mill and so that as the legs pass the mill under the control of the jaws J J the mill will cut away the inner surface of the outer end of the legs and form the recess between the legs, as indicated in Fig. 7. Thence the pin is carried forward and a second presented, and so on, the successive pins presented being in like manner recessed, the blade I, with the jaws H, always insuring the proper presentation of the legs of the pin to the mill.

The machine may be employed as a machine independent of the machine which bends the pin, or it may be in connection therewith. In some cases I prefer to point the ends of the legs in the same disk which presents the pins to the mill. In doing so I arrange a mandrel, K, in suitable bearings, and so as to revolve rapidly, the axis of the mandrel being in line with one of the radial recesses in the disk A which carry the pins, and as indicated in Fig. 1. This mandrel carries at its inner end a cutter, L, in shape adapted to produce the required conical shape for the end of the pin, and as the pin is presented in line with the mandrel the mandrel is advanced onto the pin and so as to cut the end of the pin into the required conical shape. This mandrel in its operation is substantially the same as that shown and described in Patent No. 330,661, granted to me for making cotter-pins.

The particular mechanism by which the mandrel is operated is unnecessary to be shown, as the mandrel constitutes no part of my present invention.

I have said that the disk A and the mill for recessing the ends of the pins may be used independent of the machine which bends the pins, and this is desirable, because I have found in practice that the chips which are produced by the mill cutting the end of the pin are unavoidably thrown into the machine and become a detriment to the proper working of the machine. The rotation of the disk may be constant or intermittent, as may be desirable, such constant or intermittent rotation of disks for feeding the blanks being so common and well known a device that it is unnecessary to describe either in this specification. The jaws J may be omitted when the strength of the legs of the pin is sufficient to properly support them against the mill.

In the illustration, Figs. 1 and 2, the disk is represented as arranged to revolve in a vertical plane; but it may be in a horizontal plane, if preferred.

I have represented the carrying-disk as having the carrying-recesses in the form of slots transversely across the disk, and so that the cheeks close the sides of the recesses as the disk revolves between the cheeks, and this I prefer; but I do not wish to be understood as confining the invention to the use of the cheeks, as the disk may be constructed with radial recesses in its periphery, and which do not extend through thesides of the disk, as indicated in Fig. 8.

I claim-- 1. In a machine for making cotter-pins, a carrier adapted to receive the bent pins and support them with the divided ends exposed, a blade the sharp edge of which is in a plane parallel with said carrier and arranged with the sharp edge in the path of the divided ends of the pins in the carrier, and a mill revolving in the plane of the sharp edge of said blade, the cutting-edge of the said mill corresponding to the recess required to be made at the end of the pin, substantially as described.

2. The combination of arotating carrier, A, having radial recesses therein adapted to re ceive cotter-pin blanks and leave the ends exposed, a pair of cheeks, D, between which said disk rotates, a blade, I, the sharp edge of which is in the central plane of the said disk and near its periphery, a pair of stationary jaws, H, at said blade, and between which the blanks in the carrier will pass as they advance onto the blade, with a mill revolving in the plane of the edge of said blade, substantially as and for the purpose described.

3. The combination of the rotating disk A, having radial recesses therein adapted to re ceive cotter-pin blanks and leave the divided ends exposed, a blade, I, the sharp edge of which is in the central plane of said disk and in the pathof the ends of the pins carried therein, a mill revolving in the plane of the edge of said blade, and a pair of stationary jaws, one each side the edge of said mill, and between which jaws the ends of the pin on the respective sides of the blades will bear as they pass the mill, substantially as and for the purpose described.

JOHN ADT.

Witnesses: I

FRED G. EARLE, J H. SHUMWAY. 

